Optical disk having track offset detection areas

Details Optical disk having track offset detection areas Optical disk having track offset detection areas

1987-02-03

1989-08-08

Faber, Alan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 46, 369278, G11B 724

Patent

active

048559911

ABSTRACT:
An optical disk having a disk-like substrate and a recording layer provided on the substrate. First and second regions are alternately arranged along a rotational direction of the optical disk. The first region includes a pre-formed optically detectable portion having an address area, and the second region has a guide groove serving as an optical guide for a light spot. A track offset detection area is provided for detecting track offset due to inclination of the optical disk and is disposed with respect to the first region and the second region so that the light spot is not affected by the first region and the second region. The track offset detection area is preferably a mirror portion disposed between the first region and the second region.

REFERENCES:
patent: 4363116 (1982-12-01), Kleuters et al.
patent: 4385372 (1983-05-01), Drexler
patent: 4443870 (1984-04-01), Hazel et al.
patent: 4455632 (1984-06-01), Braat
patent: 4484319 (1984-11-01), Koishi et al.
patent: 4494226 (1985-01-01), Hazel et al.
patent: 4499574 (1985-02-01), Braat
patent: 4535439 (1985-08-01), Satoh et al.
patent: 4556966 (1985-12-01), Bricot et al.

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